*{
    margin: 0;
    padding: 0;
}
a{
    text-decoration: none;
    color: black;
}
li{
    list-style: none;
}
.nav>li{
    float: left;
    padding: 50px 0px;
    margin: 50px 40px;
}
.nav>li>ul{
 margin-top: 10px;
 text-align: center;
 display: none;
 color: gray;
 font-size: 14px;
}